[問題] 兩個簡單的文法問題

[wizardofevil (麒麟)]

請問各位高手

My birthday is on January 1st.

My birthday is January 1st.

哪個是對的呢?

被學生問的時候覺得好像兩個都對但上面的又好像比較正確一點...

另外

Four thousand dollars were paid by Ricky.

Four thousand dollars was paid by Ricky.

學校老師說下面的是對的,但是為何呢?

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◆ From: 122.126.118.68
推 cooxander:You need a preposition; 4000 dollars is taken
→ cooxander:as "a bill" or a kind of something
推 Miere:第一題兩種用法在書上都看過
→ Miere:第二題要把5千元當作一個"單一的量"來看 視為單數
推 suedenliebe:第一題我偏好+ on,在幾月幾號語感還是有on較好
→ suedenliebe:第二題我想是were,因為dollar已經用複數表達,
→ suedenliebe:但5 thousand dollar若後面接子句,which/that動詞單數
→ wadepzw:有ON強調那一天生日 沒ON是屬於類似專有名詞來看
→ wadepzw:如果用WERE不通 因為帳款金額才可以"付" 算是類似集合N.